China's Central Discipline Inspection Committee detained Tianjin Police Chief Wu Changshun on July 19, shortly after reports emerged of rampant corruption in the state-owned construction sectors in Tianjin. Chinese media are now confirming the details of the alleged corruption. Wu's arrest coincided with the announcement that China's 4th Party Plenum in October would focus on personnel policy and the fight against corruption. Although the report did not include specific details, Stratfor has heard rumors suggesting at least one aspect of the discussion will involve curbing the power of the police and the internal security apparatuses, which are often seen to operate extralegally. Interestingly, the police force and internal security in general were under the purview of the powerful Zhou Yongkang, China's former domestic security chief on the Politburo Standing Committee who was recently released from duty for corruption .